docs: updating the changelog

CHANGELOG.md

@@ -4,6 +4,19 @@ All notable changes to this project will be documented in this file. Dates are d
 
 Generated by [`auto-changelog`](https://github.com/CookPete/auto-changelog).
 
+#### [v3.1.2](https://github.com/readmeio/oas/compare/v3.1.1...v3.1.2)
+
+> 19 March 2020
+
+- chore: removing unnecessary files from published npm packages [`9436a53`](https://github.com/readmeio/oas/commit/9436a5382271dc62afb6ca8a8f432170d9f199f7)
+
+#### [v3.1.1](https://github.com/readmeio/oas/compare/v3.1.0...v3.1.1)
+
+> 19 March 2020
+
+- fix: resolve issue where a freeform object couldn't be jsonschema [`#130`](https://github.com/readmeio/oas/pull/130)
+- build: 3.1.0 changelog [`5bc134c`](https://github.com/readmeio/oas/commit/5bc134ce4aa34e44375425a300d8bb149f625825)
+
 #### [v3.1.0](https://github.com/readmeio/oas/compare/v3.0.1...v3.1.0)
 
 > 16 March 2020